C180 Mopar Fuse Relay Box

Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super present car that I am ready to drive off a cliff. had a idle surge misfortune that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After maddening 2-3 every other used IAC s, I took it to the master tech at lexus. He said it was the IAC valve. He tried my used ones.. and finally a rebuilt one. nevertheless had issues. urge on to the dealer.. this become old he says, it needs a ECU. I did a lot of research on them, and found that its a common pain following this car.. bought a used one.. more trouble. had the native one rebuilt by a specialist.. and that s where I am at now.. Put it in tonight and the car idles at 2k rpm. Does the TPS infatuation to be re-adjusted? The master tech did all sorts of diagnostics upon every aligned parts (tps, maf, iac). $100-200 all get older I take on it pull off the dealer for diagnostics.. upon going problems are in reality tally up. I m hesitant to adjoin the tps if he had it dialed. Any insight? Thanks in advance. Jason

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Thanks for your response. I just checked what you mentioned, that I hadn't already checked, except fuel pressure.Let me say you a little more nearly the burden history. It currently has a master tech attributed idle ventilate control valve and tps installed. without touching anything, the last (used) ecu and my original, would control in the car without this symptom.

afterward I begin the car, the engine surges happening amid 1200 and 2000 rpm help and forth. I misused the IAC and the TPS once no amend in symptoms. I have noticed that several Lexus SC's have this same issue. Prior to this I would have to get used to the idle rapidity screw to humiliate the rpm and it would preserve for a while. Now, the engine is for ever and a day surging to the lessening where I cannot steer it for clock radio of damage to the steer train. Any experienced solution?

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